#include <iostream>

using namespace std;

int zs(int i){
    return i+1;
}

int main(int argc,char *argv[]){
    int num;
    num=1;
    cin >> num;
    cout << zs(num) << endl;
    cout << "num = " << num << endl;
    cout << "Hello world!" << endl;



    return 0;
}
